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Technical Parameters: Chip: domestic MAX3232CSE Voltage range: 3V~5V Baud rate: It is recommended not to be higher than 120kbps Size: 9.4mm*15.9mm The following is a diagram of the front and back of the module. The power supplies on both sides are connected together, and you only need to connect one side. Two independent channels on both sides can be used. The arrow indicates the signal flow direction, the inside indicates the input, and the outside indicates It is output, near RS232 character end is RS232 level, close to TTL character end is TTL level Module size drawing, the pad spacing is the standard 2.54mm...